Technical Report Archive and Image Library (TRAIL) - 53 Matching Results

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United States Earthquakes, 1929

Description: Report discussing earthquake activity in the United States during 1929. The report is broken down by regions and has sections for specific earthquakes.
Date: 1931
Creator: Heck, N. H. & Bodle, R. R.
Partner: UNT Libraries Government Documents Department

Iron-Ore Resources of the United States: Including Alaska and Puerto Rico, 1955

Description: From introduction: The purpose of this report is to summarize available information concerning iron-ore resources in the United States in order to provide a general background for understanding and appraising the present status of this basic commodity.
Date: 1959
Creator: Carr, Martha S. & Dutton, Carl E.
Partner: UNT Libraries Government Documents Department

United States Earthquakes, 1928

Description: Report discussing earthquake activity in the United States during 1928. The report is broken down by regions and has sections for specific earthquakes.
Date: 1930
Creator: Heck, N. H. & Bodle, R. R.
Partner: UNT Libraries Government Documents Department

United States Earthquakes, 1930

Description: Report discussing earthquake activity in the United States during 1930. The report is broken down by regions and has sections for specific earthquakes.
Date: 1932
Creator: Neumann, Frank & Bodle, R. R.
Partner: UNT Libraries Government Documents Department

State Compensatory Provisions for Occupational Diseases

Description: From Introduction: "This publication includes the laws of the States, the District of Columbia, Puerto Rico, and the Virgin Island through 1964. Only those portions of the workmen's compensation laws which apply to or are related to and deletions from the basic law have been incorporated into the text of the law, thus making it unnecessary to search out the various amendments made each year."
Date: unknown
Creator: Morgis, G. G.; Beauregard, Lena P. & Shoub, Earle P.
Partner: UNT Libraries Government Documents Department

Ground Water in the Lajas Valley, Puerto Rico

Description: Abstract: Lajas Valley is plagued with problems of salinity and waterlogging the soils. Use of brackish (500 milligrams per liter) irrigation compounded ground water for the problem until an irrigation-drainage system was constructed in 1955. Lajas is an alluvium-filled limestone highlands. The alluvium, mostly clay and as much 300 feet (90 meters) thick, contains brackish ground water except in the recharge areas located along the foothills...Results from a digital model show that a network of discharge wells could alleviate waterlogging of the soils in the artesian area.
Date: March 1977
Creator: Anderson, Henry R.
Partner: UNT Libraries Government Documents Department

History of Dredging and Filling of Lagoons in the San Juan Area, Puerto Rico

Description: Abstract: Laguna La Torrecilla, Laguna de Pinones, Laguna San Jose, and Laguna del Condado, in the San Juan, Puerto Rico area, are located within a metropolitan area of more than 1 million people. Bathymetric maps made during the study, in 1973, showed that Lagunas La Torrecilla, San Jose, and del Condado have been modified by dredging and filling; whereas, Laguna de Pinones has remained in a near natural state. Laguna La Torrecilla has been dredged to a depth, in places, of about 18 metres, and Lagunas San Jose and del Condado, in places to about 11 meters. Dredging in the San Juan lagoons has been harmful, beneficial, and in a few instances has had little or no noticeable effect on the water quality. Usually, dredging in the connecting canals has been beneficial if the water entering the lagoons through the canals was of better quality than the water in the lagoon. Dredging in the mouths of lagoons has been beneficial; whereas, filling or blocking the mouths has been harmful.
Date: September 1976
Creator: Ellis, S. R.
Partner: UNT Libraries Government Documents Department